choose correct alternativeIf 49x – 57y = 172 and 57x – 49y = 252 then x – y = ……… ? (A) 80 (B) 4 (C) 10 (D) 8 About the author Amelia

Answer: (C) 10 Step-by-step explanation: 57x – 49y = 252. Eqn 1 49x – 57y = 172 Eqn2 On subtracting Eqn 1 and 2 qe get 8x + 8y = 80 [divide by 8 on bothsides] x + y =10 Reply

Answer:(C) 10

Step-by-step explanation:57x – 49y = 252. Eqn 1

49x – 57y = 172 Eqn2

On subtracting Eqn 1 and 2 qe get

8x + 8y = 80 [divide by 8 on bothsides]

x + y =10